Easily Installation: It is specially designed to fit the metal bar of car back seat headrest,full fitting and would not fall off.Built-in environmental silicone makes it grip more firmly and would not scratch.Very easy to install. , Adjustable Width for Different Car: With a built-in strong spring and its Press Type Design,the width of the clamping bar can be adjusted to fit different car seats by pressing it. , 360 Degree Rotation Tablet & Phone Holder: A full 360-degree rotation allows you to adjust to any desired angle for perfect viewing angle. , Charging Port Design:Side-opening is made for USB cable and headphone jack,especially the charging port design, makes it easy and convenient to charge your devices. , Wide Compatibility:Clamp mouth can be adjusted from 4.7inch-7inch.Fits for all 4 - 11 inches iPad,tablets,Kindle Fire HD and cell phones. ,